22125231 has 20 divisors (see below), whose sum is σ = 34194600. Its totient is φ = 14240016.

The previous prime is 22125217. The next prime is 22125239. The reversal of 22125231 is 13252122.

It is not a de Polignac number, because 22125231 - 2⁶ = 22125167 is a prime.

It is a super-2 number, since 2×22125231² = 979051693606722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125239) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2361 + ... + 7058.

It is an arithmetic number, because the mean of its divisors is an integer number (1709730).

Almost surely, 2^22125231 is an apocalyptic number.

22125231 is a deficient number, since it is larger than the sum of its proper divisors (12069369).

22125231 is an equidigital number, since it uses as much as digits as its factorization.

22125231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9460 (or 9451 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22125231 is about 4703.7464855156. The cubic root of 22125231 is about 280.7345974131.

Adding to 22125231 its reverse (13252122), we get a palindrome (35377353).

It can be divided in two parts, 221 and 25231, that added together give a palindrome (25452).

The spelling of 22125231 in words is "twenty-two million, one hundred twenty-five thousand, two hundred thirty-one".